I have the same problem with our CB2.
I have changed the battery and followed the service instructions that are referenced, and everything is ok, except that the CB2 cannot boot without a quick fix. Have you fixed anything else in the BIOS besides the address for USB?
No, never.
I performed this procedure probably over 20 times on CB2.0 and 3.0, the only time I had to do the fix on every boot was because of the new battery polarity being wrong.
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